Allow creating fragmented MP4 file via demo app

PiperOrigin-RevId: 594435072

demos/transformer/src/main/java/androidx/media3/demo/transformer/ConfigurationActivity.java

@@ -78,6 +78,7 @@ public final class ConfigurationActivity extends AppCompatActivity {
   public static final String ENABLE_FALLBACK = "enable_fallback";
   public static final String ENABLE_DEBUG_PREVIEW = "enable_debug_preview";
   public static final String ABORT_SLOW_EXPORT = "abort_slow_export";
+  public static final String PRODUCE_FRAGMENTED_MP4 = "produce_fragmented_mp4";
   public static final String HDR_MODE = "hdr_mode";
   public static final String AUDIO_EFFECTS_SELECTIONS = "audio_effects_selections";
   public static final String VIDEO_EFFECTS_SELECTIONS = "video_effects_selections";
@@ -230,6 +231,7 @@ public final class ConfigurationActivity extends AppCompatActivity {
   private @MonotonicNonNull CheckBox enableFallbackCheckBox;
   private @MonotonicNonNull CheckBox enableDebugPreviewCheckBox;
   private @MonotonicNonNull CheckBox abortSlowExportCheckBox;
+  private @MonotonicNonNull CheckBox produceFragmentedMp4CheckBox;
   private @MonotonicNonNull Spinner hdrModeSpinner;
   private @MonotonicNonNull Button selectAudioEffectsButton;
   private @MonotonicNonNull Button selectVideoEffectsButton;
@@ -345,6 +347,7 @@ public final class ConfigurationActivity extends AppCompatActivity {
     enableDebugPreviewCheckBox = findViewById(R.id.enable_debug_preview_checkbox);
 
     abortSlowExportCheckBox = findViewById(R.id.abort_slow_export_checkbox);
+    produceFragmentedMp4CheckBox = findViewById(R.id.produce_fragmented_mp4_checkbox);
 
     ArrayAdapter<String> hdrModeAdapter =
         new ArrayAdapter<>(/* context= */ this, R.layout.spinner_item);
@@ -409,6 +412,7 @@ public final class ConfigurationActivity extends AppCompatActivity {
     "enableFallbackCheckBox",
     "enableDebugPreviewCheckBox",
     "abortSlowExportCheckBox",
+    "produceFragmentedMp4CheckBox",
     "hdrModeSpinner",
     "audioEffectsSelections",
     "videoEffectsSelections"
@@ -450,6 +454,7 @@ public final class ConfigurationActivity extends AppCompatActivity {
     bundle.putBoolean(ENABLE_FALLBACK, enableFallbackCheckBox.isChecked());
     bundle.putBoolean(ENABLE_DEBUG_PREVIEW, enableDebugPreviewCheckBox.isChecked());
     bundle.putBoolean(ABORT_SLOW_EXPORT, abortSlowExportCheckBox.isChecked());
+    bundle.putBoolean(PRODUCE_FRAGMENTED_MP4, produceFragmentedMp4CheckBox.isChecked());
     String selectedhdrMode = String.valueOf(hdrModeSpinner.getSelectedItem());
     bundle.putInt(HDR_MODE, checkNotNull(HDR_MODE_DESCRIPTIONS.get(selectedhdrMode)));
     bundle.putBooleanArray(AUDIO_EFFECTS_SELECTIONS, audioEffectsSelections);

demos/transformer/src/main/java/androidx/media3/demo/transformer/TransformerActivity.java

@@ -87,6 +87,8 @@ import androidx.media3.transformer.EditedMediaItemSequence;
 import androidx.media3.transformer.Effects;
 import androidx.media3.transformer.ExportException;
 import androidx.media3.transformer.ExportResult;
+import androidx.media3.transformer.InAppMuxer;
+import androidx.media3.transformer.Muxer;
 import androidx.media3.transformer.ProgressHolder;
 import androidx.media3.transformer.Transformer;
 import androidx.media3.ui.AspectRatioFrameLayout;
@@ -320,11 +322,21 @@ public final class TransformerActivity extends AppCompatActivity {
               .setEnableFallback(bundle.getBoolean(ConfigurationActivity.ENABLE_FALLBACK))
               .build());
 
+      long maxDelayBetweenSamplesMs = DefaultMuxer.Factory.DEFAULT_MAX_DELAY_BETWEEN_SAMPLES_MS;
       if (!bundle.getBoolean(ConfigurationActivity.ABORT_SLOW_EXPORT)) {
-        transformerBuilder.setMuxerFactory(
+        maxDelayBetweenSamplesMs = C.TIME_UNSET;
-            new DefaultMuxer.Factory(/* maxDelayBetweenSamplesMs= */ C.TIME_UNSET));
       }
 
+      Muxer.Factory muxerFactory = new DefaultMuxer.Factory(maxDelayBetweenSamplesMs);
+      if (bundle.getBoolean(ConfigurationActivity.PRODUCE_FRAGMENTED_MP4)) {
+        muxerFactory =
+            new InAppMuxer.Factory.Builder()
+                .setMaxDelayBetweenSamplesMs(maxDelayBetweenSamplesMs)
+                .setFragmentedMp4Enabled(true)
+                .build();
+      }
+      transformerBuilder.setMuxerFactory(muxerFactory);
+
       if (bundle.getBoolean(ConfigurationActivity.ENABLE_DEBUG_PREVIEW)) {
         transformerBuilder.setDebugViewProvider(new DemoDebugViewProvider());
       }

demos/transformer/src/main/res/layout/configuration_activity.xml

@@ -215,6 +215,15 @@
           android:id="@+id/abort_slow_export_checkbox"
           android:layout_gravity="end"/>
       </TableRow>
+      <TableRow
+        android:layout_weight="1">
+        <TextView
+          android:layout_gravity="center_vertical"
+          android:text="@string/produce_fragmented_mp4" />
+        <CheckBox
+          android:id="@+id/produce_fragmented_mp4_checkbox"
+          android:layout_gravity="end"/>
+      </TableRow>
       <TableRow
         android:layout_weight="1"
         android:gravity="center_vertical" >

demos/transformer/src/main/res/values/strings.xml

@@ -30,6 +30,7 @@
   <string name="enable_fallback" translatable="false">Enable fallback</string>
   <string name="enable_debug_preview" translatable="false">Enable debug preview</string>
   <string name="abort_slow_export" translatable="false">Abort slow export</string>
+  <string name="produce_fragmented_mp4" translatable="false">Produce fragmented MP4</string>
   <string name="trim" translatable="false">Trim</string>
   <string name="hdr_mode" translatable="false">HDR mode</string>
   <string name="select_audio_effects" translatable="false">Add audio effects</string>